Horrible Service!!! or lack thereof

I took my laptop to MATRIX when I wanted to upgrade the memory from 4GB to 8GB - Immediately thereafter my laptop would not function for more than 5 minutes, it would not even boot up quick enough. I took it back and I was told they had to install new drivers which they charged me for. The problem persisted! After a few days of going back and loosing business, I was told it was the HDD which I bought from them and they replaced it. My laptop now switches off while I am working on it. I reported to this to their so called head office and I was told to take it back to the store that messed it up in the first place, they would in turn send it to head office. I explained to Schalk that since they messed it up in the first place, they should send a technician, he sent me an email with a quote for sending out a technician plus labor costs. <br> <br> Why must I pay for their mess? My laptop was about 4-6 months old when they opened it! My warranty with HP is voided because it was opened by armatures who use google in my presence to do fault finding. They are just guessing!<br> <br> I have asked him a question about this and to date I have not had a response. I am really disappointed with such treatment.<br>